Pyridine yog ib qho tshuaj tsw qab uas muaj cov amine. Cov tshuaj tsw qab yog suav tias yog qhov ruaj khov heev thiab lawv tsuas tuaj yeem ua rau muaj kev cuam tshuam yog tias cov khoom kawg khaws cov aromaticity ntawm lub nplhaib. Lub aromatic compound pyridine muaj peb resonance qauv Yog li, pyridine yog ib qho tshuaj tsw qab.
Vim li cas pyridine thiaj li tsw qab thiab puag?
Pyridine muaj conjugated system ntawm rau π electrons uas yog delocalized hla lub nplhaibCov molecule yog cov qauv thiab, yog li, ua raws li Hückel cov qauv rau cov tshuab aromatic. Nyob rau hauv sib piv rau benzene, lub electron ceev tsis sib npaug zos rau ntawm lub nplhaib, qhia txog qhov tsis zoo inductive nyhuv ntawm nitrogen atom.
Vim li cas pyridine muaj ntxhiab ntau dua li pyrrole?
Pyridine muaj qhov ruaj khov sib txuas ntawm 3 ob daim ntawv cog lus hauv lub nplhaib uas muaj ntxhiab. Yog li ntawd, ib leeg ib khub ntawm electrons tam sim no nyob rau hauv nitrogen atom nyob rau hauv pyridine muaj peev xwm pub ib hydrogen ion yooj yim los yog ib tug Lewis acid. Yog li, pyridine yog lub hauv paus muaj zog dua pyrrole
YPuas yog pyridine muaj ntxhiab ntau dua li benzene?
Hauv pyridine, muaj huab cua tsis sib xws, uas ua rau cov qauv ntawm pyridine tsis ruaj khov li piv rau benzene. Yog li ntawd, pyridine muaj tsawg resonance zog tshaj benzene uas ua rau nws tsawg aromatic tshaj benzene.
Qhov twg yog benzene uas muaj ntxhiab ntau dua lossis pyrrole?
Kev Txiav Txim ntawm Aromaticity
Benzene yog ntau dua aromaticthiophene, pyrrole thiab oxygen vim tias tag nrho cov π electrons tau koom nrog hauv kev tsim cov aromatic sextet. Whereas nyob rau hauv lwm cov molecules, lub heteroatoms yog electronegative tshaj carbon, lawv rub lub electron huab ntawm lawv tus kheej.
